openwrt/package/nvram/src/main.c

   1 /*
   2  * Frontend command-line utility for Linux NVRAM layer
   3  *
   4  * Copyright 2004, Broadcom Corporation
   5  * All Rights Reserved.
   6  *
   7  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   8  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
   9  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  10  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  11  *
  12  * $Id$
  13  */
  14
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18
  19 #include <typedefs.h>
  20 #include <bcmnvram.h>
  21
  22 static void
  23 usage(void)
  24 {
  25         fprintf(stderr, "usage: nvram [get name] [set name=value] [unset name] [show]\n");
  26         exit(0);
  27 }
  28
  29 /* NVRAM utility */
  30 int
  31 main(int argc, char **argv)
  32 {
  33         char *name, *value, buf[NVRAM_SPACE];
  34         int size;
  35
  36         /* Skip program name */
  37         --argc;
  38         ++argv;
  39
  40         if (!*argv)
  41                 usage();
  42
  43         /* Process the remaining arguments. */
  44         for (; *argv; argv++) {
  45                 if (!strncmp(*argv, "get", 3)) {
  46                         if (*++argv) {
  47                                 if ((value = nvram_get(*argv)))
  48                                         puts(value);
  49                         }
  50                 }
  51                 else if (!strncmp(*argv, "set", 3)) {
  52                         if (*++argv) {
  53                                 strncpy(value = buf, *argv, sizeof(buf));
  54                                 name = strsep(&value, "=");
  55                                 nvram_set(name, value);
  56                         }
  57                 }
  58                 else if (!strncmp(*argv, "unset", 5)) {
  59                         if (*++argv)
  60                                 nvram_unset(*argv);
  61                 }
  62                 else if (!strncmp(*argv, "commit", 5)) {
  63                         nvram_commit();
  64                 }
  65                 else if (!strncmp(*argv, "show", 4) ||
  66                            !strncmp(*argv, "getall", 6)) {
  67                         nvram_getall(buf, sizeof(buf));
  68                         for (name = buf; *name; name += strlen(name) + 1)
  69                                 puts(name);
  70                         size = sizeof(struct nvram_header) + (int) name - (int) buf;
  71                         fprintf(stderr, "size: %d bytes (%d left)\n", size, NVRAM_SPACE - size);
  72                 }
  73                 if (!*argv)
  74                         break;
  75         }
  76
  77         return 0;
  78 }